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ASTM D5242-21

Current Revision

Standard Test Method for Open-Channel Flow Measurement of Water with Thin-Plate Weirs

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1.1 This test method covers measurement of the volumetric flow rate of water and wastewater in channels with thin-plate weirs. Information related to this test method can be found in Rantz (1)2 and Ackers (2).

1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


5.1 Thin-plate weirs are reliable and simple devices that have the potential for highly accurate flow measurements. With proper selection of the shape of the overflow section a wide range of discharges can be covered; the recommendations in this test method are based on experiments with flow rates from about 0.008 ft 3/s (0.00023 m  3/s) to about 50 ft 3/s (1.4 m 3/s).

5.2 Thin-plate weirs are particularly suitable for use in water and wastewater without significant amounts of solids and in locations where a head loss is affordable.

SDO ASTM: ASTM International
Document Number D5242
Publication Date Dec. 15, 2021
Language en - English
Page Count 8
Revision Level 21
Supercedes
Committee D19.07
Publish Date Document Id Type View
Dec. 15, 2021 D5242-21 Revision
Jan. 1, 2013 D5242-92R13 Reaffirmation
June 15, 2007 D5242-92R07 Reaffirmation
Jan. 1, 2001 D5242-92R01 Reaffirmation